From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755334AbbI3Jhh (ORCPT ); Wed, 30 Sep 2015 05:37:37 -0400 Received: from szxga03-in.huawei.com ([119.145.14.66]:3555 "EHLO szxga03-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755259AbbI3Jhb (ORCPT ); Wed, 30 Sep 2015 05:37:31 -0400 Message-ID: <560BAC76.6050002@huawei.com> Date: Wed, 30 Sep 2015 17:33:42 +0800 From: Xishi Qiu User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:12.0) Gecko/20120428 Thunderbird/12.0.1 MIME-Version: 1.0 To: Andrew Morton , Mel Gorman , Tang Chen , , "Yasuaki Ishimatsu" , Zhang Yanfei CC: Linux MM , LKML Subject: [PATCH] mm: fix overflow in find_zone_movable_pfns_for_nodes() Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit X-Originating-IP: [10.177.25.179] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A090203.560BAD47.004B,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0, ip=0.0.0.0, so=2013-05-26 15:14:31, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 72d0289c307bd083bd57971c9a52605b Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If user set "movablecore=xx" to a large number, corepages will overflow, this patch fix the problem. Signed-off-by: Xishi Qiu --- mm/page_alloc.c | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 48aaf7b..af3c9bd 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -5668,6 +5668,7 @@ static void __init find_zone_movable_pfns_for_nodes(void) */ required_movablecore = roundup(required_movablecore, MAX_ORDER_NR_PAGES); + required_movablecore = min(totalpages, required_movablecore); corepages = totalpages - required_movablecore; required_kernelcore = max(required_kernelcore, corepages); -- 2.0.0